platform_build_soong/java/kotlin.go
Colin Cross 9ca38d22a4 Fix annotation processors in kotlin modules that generate resources
The kapt rule was only keeping the generated sources, and not the
generated classes directory.  The generated classes directory will
contain resources generated by the annotation processor and needs
to be added to the final jar.

Test: m ApiFinder
Bug: 153485543
Change-Id: I89197d0afcb1eee011c01aa400f9977e66f43768
2020-06-18 15:58:28 -07:00

204 lines
8 KiB
Go

// Copyright 2019 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package java
import (
"bytes"
"encoding/base64"
"encoding/binary"
"path/filepath"
"strings"
"android/soong/android"
"github.com/google/blueprint"
)
var kotlinc = pctx.AndroidRemoteStaticRule("kotlinc", android.RemoteRuleSupports{Goma: true},
blueprint.RuleParams{
Command: `rm -rf "$classesDir" "$srcJarDir" "$kotlinBuildFile" "$emptyDir" && ` +
`mkdir -p "$classesDir" "$srcJarDir" "$emptyDir" && ` +
`${config.ZipSyncCmd} -d $srcJarDir -l $srcJarDir/list -f "*.java" $srcJars && ` +
`${config.GenKotlinBuildFileCmd} $classpath "$name" $classesDir $out.rsp $srcJarDir/list > $kotlinBuildFile &&` +
`${config.KotlincCmd} ${config.JavacHeapFlags} $kotlincFlags ` +
`-jvm-target $kotlinJvmTarget -Xbuild-file=$kotlinBuildFile -kotlin-home $emptyDir && ` +
`${config.SoongZipCmd} -jar -o $out -C $classesDir -D $classesDir && ` +
`rm -rf "$srcJarDir"`,
CommandDeps: []string{
"${config.KotlincCmd}",
"${config.KotlinCompilerJar}",
"${config.KotlinPreloaderJar}",
"${config.KotlinReflectJar}",
"${config.KotlinScriptRuntimeJar}",
"${config.KotlinStdlibJar}",
"${config.KotlinTrove4jJar}",
"${config.KotlinAnnotationJar}",
"${config.GenKotlinBuildFileCmd}",
"${config.SoongZipCmd}",
"${config.ZipSyncCmd}",
},
Rspfile: "$out.rsp",
RspfileContent: `$in`,
},
"kotlincFlags", "classpath", "srcJars", "srcJarDir", "classesDir", "kotlinJvmTarget", "kotlinBuildFile",
"emptyDir", "name")
// kotlinCompile takes .java and .kt sources and srcJars, and compiles the .kt sources into a classes jar in outputFile.
func kotlinCompile(ctx android.ModuleContext, outputFile android.WritablePath,
srcFiles, srcJars android.Paths,
flags javaBuilderFlags) {
var deps android.Paths
deps = append(deps, flags.kotlincClasspath...)
deps = append(deps, srcJars...)
kotlinName := filepath.Join(ctx.ModuleDir(), ctx.ModuleSubDir(), ctx.ModuleName())
kotlinName = strings.ReplaceAll(kotlinName, "/", "__")
ctx.Build(pctx, android.BuildParams{
Rule: kotlinc,
Description: "kotlinc",
Output: outputFile,
Inputs: srcFiles,
Implicits: deps,
Args: map[string]string{
"classpath": flags.kotlincClasspath.FormJavaClassPath("-classpath"),
"kotlincFlags": flags.kotlincFlags,
"srcJars": strings.Join(srcJars.Strings(), " "),
"classesDir": android.PathForModuleOut(ctx, "kotlinc", "classes").String(),
"srcJarDir": android.PathForModuleOut(ctx, "kotlinc", "srcJars").String(),
"kotlinBuildFile": android.PathForModuleOut(ctx, "kotlinc-build.xml").String(),
"emptyDir": android.PathForModuleOut(ctx, "kotlinc", "empty").String(),
// http://b/69160377 kotlinc only supports -jvm-target 1.6 and 1.8
"kotlinJvmTarget": "1.8",
"name": kotlinName,
},
})
}
var kapt = pctx.AndroidRemoteStaticRule("kapt", android.RemoteRuleSupports{Goma: true},
blueprint.RuleParams{
Command: `rm -rf "$srcJarDir" "$kotlinBuildFile" "$kaptDir" && ` +
`mkdir -p "$srcJarDir" "$kaptDir/sources" "$kaptDir/classes" && ` +
`${config.ZipSyncCmd} -d $srcJarDir -l $srcJarDir/list -f "*.java" $srcJars && ` +
`${config.GenKotlinBuildFileCmd} $classpath "$name" "" $out.rsp $srcJarDir/list > $kotlinBuildFile &&` +
`${config.KotlincCmd} ${config.KotlincSuppressJDK9Warnings} ${config.JavacHeapFlags} $kotlincFlags ` +
`-Xplugin=${config.KotlinKaptJar} ` +
`-P plugin:org.jetbrains.kotlin.kapt3:sources=$kaptDir/sources ` +
`-P plugin:org.jetbrains.kotlin.kapt3:classes=$kaptDir/classes ` +
`-P plugin:org.jetbrains.kotlin.kapt3:stubs=$kaptDir/stubs ` +
`-P plugin:org.jetbrains.kotlin.kapt3:correctErrorTypes=true ` +
`-P plugin:org.jetbrains.kotlin.kapt3:aptMode=stubsAndApt ` +
`-P plugin:org.jetbrains.kotlin.kapt3:javacArguments=$encodedJavacFlags ` +
`$kaptProcessorPath ` +
`$kaptProcessor ` +
`-Xbuild-file=$kotlinBuildFile && ` +
`${config.SoongZipCmd} -jar -o $out -C $kaptDir/sources -D $kaptDir/sources && ` +
`${config.SoongZipCmd} -jar -o $classesJarOut -C $kaptDir/classes -D $kaptDir/classes && ` +
`rm -rf "$srcJarDir"`,
CommandDeps: []string{
"${config.KotlincCmd}",
"${config.KotlinCompilerJar}",
"${config.KotlinKaptJar}",
"${config.GenKotlinBuildFileCmd}",
"${config.SoongZipCmd}",
"${config.ZipSyncCmd}",
},
Rspfile: "$out.rsp",
RspfileContent: `$in`,
},
"kotlincFlags", "encodedJavacFlags", "kaptProcessorPath", "kaptProcessor",
"classpath", "srcJars", "srcJarDir", "kaptDir", "kotlinJvmTarget", "kotlinBuildFile", "name",
"classesJarOut")
// kotlinKapt performs Kotlin-compatible annotation processing. It takes .kt and .java sources and srcjars, and runs
// annotation processors over all of them, producing a srcjar of generated code in outputFile. The srcjar should be
// added as an additional input to kotlinc and javac rules, and the javac rule should have annotation processing
// disabled.
func kotlinKapt(ctx android.ModuleContext, srcJarOutputFile, resJarOutputFile android.WritablePath,
srcFiles, srcJars android.Paths,
flags javaBuilderFlags) {
var deps android.Paths
deps = append(deps, flags.kotlincClasspath...)
deps = append(deps, srcJars...)
deps = append(deps, flags.processorPath...)
kaptProcessorPath := flags.processorPath.FormRepeatedClassPath("-P plugin:org.jetbrains.kotlin.kapt3:apclasspath=")
kaptProcessor := ""
for i, p := range flags.processors {
if i > 0 {
kaptProcessor += " "
}
kaptProcessor += "-P plugin:org.jetbrains.kotlin.kapt3:processors=" + p
}
encodedJavacFlags := kaptEncodeFlags([][2]string{
{"-source", flags.javaVersion.String()},
{"-target", flags.javaVersion.String()},
})
kotlinName := filepath.Join(ctx.ModuleDir(), ctx.ModuleSubDir(), ctx.ModuleName())
kotlinName = strings.ReplaceAll(kotlinName, "/", "__")
ctx.Build(pctx, android.BuildParams{
Rule: kapt,
Description: "kapt",
Output: srcJarOutputFile,
ImplicitOutput: resJarOutputFile,
Inputs: srcFiles,
Implicits: deps,
Args: map[string]string{
"classpath": flags.kotlincClasspath.FormJavaClassPath("-classpath"),
"kotlincFlags": flags.kotlincFlags,
"srcJars": strings.Join(srcJars.Strings(), " "),
"srcJarDir": android.PathForModuleOut(ctx, "kapt", "srcJars").String(),
"kotlinBuildFile": android.PathForModuleOut(ctx, "kapt", "build.xml").String(),
"kaptProcessorPath": strings.Join(kaptProcessorPath, " "),
"kaptProcessor": kaptProcessor,
"kaptDir": android.PathForModuleOut(ctx, "kapt/gen").String(),
"encodedJavacFlags": encodedJavacFlags,
"name": kotlinName,
"classesJarOut": resJarOutputFile.String(),
},
})
}
// kapt converts a list of key, value pairs into a base64 encoded Java serialization, which is what kapt expects.
func kaptEncodeFlags(options [][2]string) string {
buf := &bytes.Buffer{}
binary.Write(buf, binary.BigEndian, uint32(len(options)))
for _, option := range options {
binary.Write(buf, binary.BigEndian, uint16(len(option[0])))
buf.WriteString(option[0])
binary.Write(buf, binary.BigEndian, uint16(len(option[1])))
buf.WriteString(option[1])
}
header := &bytes.Buffer{}
header.Write([]byte{0xac, 0xed, 0x00, 0x05}) // java serialization header
if buf.Len() < 256 {
header.WriteByte(0x77) // blockdata
header.WriteByte(byte(buf.Len()))
} else {
header.WriteByte(0x7a) // blockdatalong
binary.Write(header, binary.BigEndian, uint32(buf.Len()))
}
return base64.StdEncoding.EncodeToString(append(header.Bytes(), buf.Bytes()...))
}